Which emperor made christianity the official religion of rome

Which of the following statements is true for all european union countries a. they each have their own hereditary monarchy b. they each have their own national currency c. each has its own democratic government d. each practices roman catholicism

Which indo european tribe developed a strong warrior society and built an empire that was frequently invaded by those seeking fertile land

How did the united states surprise other delegates at the washington naval conference in 1921?